Oil burner



Aug. 2s, 192s. 1,682,531

J. N. MACRAE OIL BURNER Filed June 27, 1927 INVENTOR ATTORNEY 6 Patented Aug. 28, 1928.

UNITED STATES PATENT oFFicE.

JAMES N. MACRAE, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO PETROLEUM HEAT AND POWER COMPANY, or NEW YORK,

N. Y., A CORPORATION OF DELAWARE.

OIL BURNER.

Application led June 27,

'drives the atomizer may be maintained constant, although the amount of oil burned vand hence the power necessarv to drive the burner turbine varies, it being understood that the more oil burned the greater the power required to drive the burner atomizer to give proper atomization. U

The present invention also provides, in conjunction with the construction briefly referred to above, a structure for effecting a swirling or rotating action of the air employed for atomization.

In the accompanying drawings,

Fig. 1 shows one embodiment of my invention in part sectional elevation;

Fig. 2 is a similar view showing another embodiment of my invention; and

Fig. 3 is a view similar to Fig. 1 of still another embodiment of the invention. p

Referring first of all to the embodiment illustrated in Fig. l, my im roved burner comprises an air tube A, te escoped by a secondary air tube B. Extending lengthwise of the air tube A is a fuel or oil tube C on the inner end of which is rotatably mounted an atomizer D. .The tube C, as is usual, is provided for the purpose of supplying fuel in the form of oil to the rotatable atomizer D. The mounting of the atomizer D on the tube Cis not shown in detail, inasmuch as this construction does not constitute a part of the present invention.

Mounted on the rear end of the atomizer D is an air turbine E. Air under pressure is supplied to the air tube through an inlet F, the passage of this air through the tube driving the turbine E and hence the rotatable atomizer D.

In order that the speed of the turbine may be maintained constant although the amount of fuel fed to the atomizer 1s varied and although the power required to drive 1927. Serial No. 201,567.

the turbine and hence the atomizer varies ydue to this fact, and in order that a single source of power, as a fan for example, may be employed for Afurnishing power to drive the atomizer D and the secondary air needed for combustion of the fuel, the tube A is ported as indicated at G and H, whereby communication is established `between the air tube A and the interior of the secondary air tube B. These ports are arranged on opposite sides of the turbine E and controlled by means of dampers or shutters, the shutters for ports or vents G being con- .trolled by shutter I, while the ports or vents H are controlled by dampers or shutters J. Adgustment of these shutters may be effected manually in any desired manner.

.It will be seen that the foregoing provides a construction inwhicli a single fan or other source of power may be employed for driving the turbine E, and for supplying the secondary air to the secondary air tube B which is necessary for combustion'l It will be apparent also that by adjusting the shutters I and J the pressure drop with respect to the turbine E may be varied as desired so as to suit varying conditions, thereby to provide the necessary variation in power applied to the turbine, to compensate for the variations in the amount of fuel being fed to the atomizer D, although maintaining the speed of the turbine constant.

In other words, the construction above described provides an oil burner structure in which, by adjustment of the shutters I and J, the torque of the turbine E may be varied.

The embodiment of my invention as illustrated in Fig. 2 is exactly the same as that just described, except in this instance I provide the secondary air tube B with vanes K angularly disposed with respect to the longitudinal axis of the burner, to impart a whirling or swirling action to the-secondary air leaving the secondar air tube B adjacent the discharge end o the atomizer D.

In the embodiment of my invention as illustrated in Fig. 3, I provide the air tube A on its interior with vanes L for imparting a whirling or swirling movement to the air passgig through the tube A about the atomizer may be made in the constructions above described within the purview of this invention.

What I claim is:

l. An oil burner comprising in combination, arotary atomizer, an air driven turbine for rotating said atomizer, an air tube Within which said turbine and atomizer are mounted, a secondary air tube surrounding said first mentioned tube, means for establishing communication between the tubes at each side of said turbine, and a common source of air for supplying the secondary tube and for driving said turbine.

2. An oil burner comprising in combination, a rotary atomizer, an air driven turbine for driving the same, an air tube within which said atomizer and turbine are mounted, a secondary air tube surrounding the rst mentioned tube, said first mentioned tube being rovided with ports at each side of the turblne for establishing communication between the tubes.

3. An oil burner comprising in combination, an air tube, a rotatable atomizer and a turbine for driving the same mountednwithin said tube, a secondary air tube surrounding the first mentioned tube, said first mentioned air tube being provided with adjustable ports at each side of the turbine for establishing communication between the two tubes.

4. An oil burner comprising in combination, a rotatable atomizer, an air driven turbine for driving thesame, an air tube within which the turbine and atomizer are mounted, a secondary air tube surroundin the first mentioned tube, the first mentione tube being provided with orts arranged on opposite sides of said tur ine, establishing communication between the two tubes, and a single air supply means for both tubes.

5. An oil burner comprising in combination, a rotatable atomizer, an air turbine attached to said atomizer for driving the same an air tube within which said atomizer and turbine are mounted, a secondary air tube surrounding the first mentioned tube, said tubes communicating with each other, a single supply of air under'pressure for said tubes, the air entering the secondary air tube passing through ports in the first men. tioned air tube at each side of said turbine, means for independently controlling said ports, and fins or vanes on the inner face of the secondary air tube for causing the air passing from the inner tube into and through the secondary air tube to whirl or swirl as it leaves the secondary air tube.

6. An oil burner comprising in combina! tion, a rotatable atomizer, an air turbine for driving said atomizer, an air tube surrounding the atomizer and turbine, a source of air under pressure for said tube, fins or Yanes on the inner face of said tube adjacent the discharge end of said atomizer, for imparting a whirling or'swirling motion to the air leavinflr the end of said tube, a secondary air tube surrounding the first mentioned tube, said first mentioned tube being provided with ports through its walls at each side of the turbine to establish communication between the two tubes to permit of a portion of the air passing through the first mentioned tube entering the secondary air tube.

This specification signed this 23rd day of June, 1927.

JAMES N. MACRAE. 

